Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire showing my new design, it being understood that the tread pattern repeats uniformly throughout the circumference of the tire;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof, the right side elevational view is indentical with the left side elevational view;

FIG. 4 is an enlarged fragmentary front elevational view thereof; and,

FIG. 5 is an enlarged cross-sectional view thereof taken along line 5—5 in FIG. 4.

The portion of the article shown in broken lines is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 